Occurrence law of coal seam about Mahe syncline in Yunnan Province

Mahe syncline is divided into Weixin member and Zhenxiong member.After the course of construction in Weixin and Zhenxiong member,lots of geological phenomenon is highlighted and undoubtedly revealed.The occurrence of coaly-stratum,the layer of minable seam,and the law of occurrence coal seam in the tectonic evolution characteristics of whole Mahe syncline can be generalized through determining the special regional position and collecting its special tectonic background information,combining coaly-stratum sedimentary environment and coal-forming environment condition,and comparing the 4 coal seams and 7 marker seams.A thorough analysis indicates that coal-accumulating environment can affect the change of coal seam.The study of coal-accumulating laws in Mahe syncline not only is of very importantly realistic meaning,but also suggests the occurrence stratigraphic position of coal seam and provides exploration direction for similar syncline structure.